<template>
    <div>
        <!-- 面包屑导览 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图-->
        <el-card>
            <el-row>
                <el-button type="primary">添加角色</el-button>
            </el-row>

            <!-- 角色列表区域-->
            <el-table :data="rolelist" border stripe>
                <!-- 添加一个展开按钮 -->
                <el-table-column type="expand">
                    <!-- 展开的数据 -->
                    <template slot-scope="scope">
                        <!-- 对所获得的数据进行for循环渲染-->
                        <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                        <!-- 渲染一级-->
                        <el-col :span="5">
                            <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                            <i class="el-icon-caret-right"></i>
                        </el-col>
                        <!-- 渲染二级三级-->
                        <el-col :span="19">
                            <!-- bdtop边框线-->
                            <!-- 通过for 循环嵌套渲染二级权限-->
                            <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                            <el-col :span="6">
                                <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                            <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级权限-->
                            <el-col :span="12">
                                <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">
                                {{item3.authName}}
                                </el-tag>
                            </el-col>
                            <el-col></el-col>
                            </el-row>
                        </el-col>
                        </el-row>
                        <!--<pre>
                            {{scope.row}}
                        </pre>-->
                    </template>
                </el-table-column>
                <el-table-column type="index" label="#"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300">
                    <!-- 操作模板 -->
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                        <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>

        <!-- 分配权限对话框-->
        <el-dialog
            title="分配权限"
            :visible.sync="setRightDialogVisible"
            width="50%" @close="setRightDialogClosed">
            <!-- 树形控件-->
            <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
  data () {
    return {
      rolelist: [],
      // 控制权限分配对话框显示隐藏
      setRightDialogVisible: false,
      // 获取所有权限的数据
      rightsList: [],
      //   树形控件绑定对线
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点 id 值数组
      defKeys: [],
      // 即将分配权限的id
      roleId: ''
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取角色列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolelist = res.data
      console.log(this.rolelist)
    },
    // 根据id删除对应的权限
    async removeRightById (role, rightId) {
      // 弹出提示框是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.inf('取消删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除失败')
      }
      //   this.getRolesList()  防止 列表刷新之后关闭点开的东西
      role.children = res.data
    },
    // 展示分配权限对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 在 权限分配点击后 获取所有权限的数据 转换为树行
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }
      // 把获取到的权限数据保存到data中
      this.rightsList = res.data

      // 递归获取三级节点
      this.getLeafkeys(role, this.defKeys)

      this.setRightDialogVisible = true
    },
    // 通过递归获取角色下三级权限 id 保存到数组 defKeys 中
    getLeafkeys (node, arr) {
      // 如果当前节点不包含children属性 就是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafkeys(item, arr)
      })
    },
    // 监听分配权限对话框事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      //   console.log(keys)
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配失败')
      }
      this.$message.success('分配成功')
      // 刷新列表
      this.getRolesList()
      // 隐藏对话框
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag{
    margin: 7px;
}

.bdtop{
    border-top: 1px solid #eee;
}

.bdbottom{
    border-bottom: 1px solid #eee;
}

.vcenter {
    display: flex;
    align-items: center;
}
</style>
